(19)
(11) EP 2 055 898 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
31.10.2012 Bulletin 2012/44

(43) Date of publication A2:
06.05.2009 Bulletin 2009/19

(21) Application number: 08252910.8

(22) Date of filing: 02.09.2008
(51) International Patent Classification (IPC): 
F01D 11/00(2006.01)
F01D 5/18(2006.01)
 F01D 5/08(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated Extension States:
AL BA MK RS

(30) Priority: 02.11.2007 US 982578

(71) Applicant: United Technologies Corporation
Hartford, CT 06101 (US)

(72) Inventors:
  • Spangler, Brandon W.
    Vernon, Connecticut 06066 (US)
  • Paauwe, Corneil S.
    Manchester, Connecticut 06040 (US)
  • Lehane, Christopher J.
    South Windsor, Connecticut 06074 (US)
  • Tracy, Anita L.
    Middletown, Connecticut 06457 (US)
  • Wiedemer, John D.
    Glastonbury, Connecticut 06033 (US)
  • Hjelm, Scott D.
    Windsor Locks, Connecticut 06096 (US)

(74) Representative: Booth, Catherine Louise 
Dehns St Bride's House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)

   


(54) Turbine airfoil with platform cooling


(57) Convective cooling of gas turbine engine airfoil platforms (60) is enhanced by grooving the interface of the platforms with corresponding platform-to-platform seals (95), thereby accelerating cooling airflow over the platform surfaces (65, 70).










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